What is Relining and Rebasing? Indications & Contraindications

Relining Definition

“A procedure to resurface the tissue surface of the denture with new base material to make the denture fit more accurately” – GPT.

“It refers to the process of adding base material to the tissue surface of the denture in a quantity sufficient to fill the space, which exists between the original denture contour and the altered tissue contour.” – according to Sharry.

Rebasing Definition

“A process of refitting a denture by the replacement of the denture base material”– GPT.

“It consists of replacing all of the denture base with new material.” -according to Sharry.

Denture RebasingIndications of Relining and Rebasing

  • Immediate dentures after 3-6 months where maximum RRR(residual ridge resorption) would have
  • Poor denture adaptation to the ridge due to RRR.
  • Economical reasons where the patient cannot afford a new denture.
  • Geriatric or chronically ill patients who cannot withstand the physical and mental stress of construction of new dentures.

Contraindications of Relining and Rebasing

  • Excessive RRR.
  • Abused soft tissues due to an ill-fitting denture.
  • Temporo mandibular joint problems.
  • Patient dissatisfied with the appearance of the existing dentures.
  • Unsatisfactory jaw relationships of the denture.
  • Dentures causing major speech problems.
  • Severe osseous undercuts.

How does Rebasing differ from Relining

Rebasing is similar to relining except that there is an extensive replacement of the denture base material.

The Clinical procedure is similar to that of relining.

Denture is prepared and border moulding is done.
A new vertical and centric relation should be recorded.
The impression made using the dentures are processed as in relining.
The only difference is that only a layer of acrylic is removed before wax-up in relining but in rebasing the entire denture base is removed prior to wax-up.

(generally one should keep in mind that when tissue damage is excessive the treatment shifts from relining to rebasing.)
Rebasing should be done if the vertical dimension of the patient is changed (as relining is not sufficient in these cases.)

Rebasing can be done properly only in dentures with porcelain teeth.

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